Slack是一个出色的团队和同事协作平台，可让您发送短信、共享文件和发起语音通话。然而， Slack(Slack)的一个被低估的功能是与他人共享屏幕的能力。屏幕共享对于演示和会议很有用，但您可能需要先配置您的设备。
您可以使用网络客户端或桌面应用程序在(desktop app)Slack上共享您的屏幕，但您需要先升级到付费Slack计划。如果您希望设置和使用Slack屏幕共享，您需要执行以下操作。
如何设置松弛屏幕共享(How to Set Up Slack Screen Sharing)
在您开始在Slack上使用屏幕共享之前，您需要先了解一些事项。
不幸的是，某些功能（例如语音通话和屏幕共享）仅在您的工作区采用付费计划时才可在Slack上使用。(Slack)如果您是工作区所有者或管理员，则需要先升级(need to upgrade)到按用户或单独报价的Standard、Plus或Enterprise计划，然后您（或您的用户）才能进行屏幕共享。(Enterprise)
您不需要工作摄像头来进行屏幕共享，但由于屏幕共享是语音或视频通话的一个组成部分，它可以帮助您向观众展示。至少，您需要一个可用的麦克风(working microphone)来建立语音通话并与其他参与者进行交流。
要使用Slack上的所有屏幕共享功能（例如屏幕绘图），您可能需要安装桌面应用程序(install the desktop app)。虽然您可以在浏览器中参与Slack屏幕共享通话，但只有适用于(Slack)Mac或Windows的桌面应用程序为用户提供全套功能。
如何在 Slack 中共享屏幕(How to Share Your Screen in Slack)
要在Slack(Slack)工作区中共享您的屏幕，您需要发起一个新的视频通话。
- 为此，请打开Slack应用程序或在浏览器中打开Slack工作区。(Slack)在直接消息中，选择右侧面板中的呼叫按钮开始呼叫。(Call)
- 您还可以通过单击用户名，然后在弹出窗口中选择“呼叫”按钮在频道中发起新呼叫。(Call)通过选择“开始通话”(Start Call)按钮确认(Confirm)您要开始通话。
- 建立新呼叫后，从底部的选项中选择Screen Your Share按钮。(Screen Your Share)如果您的 PC 连接了多台显示器(more than one monitor)，则需要从提供的选项中选择要共享的一台。这将允许您在一个屏幕上共享特定的应用程序，而将另一个屏幕设为私有。
一旦Slack屏幕共享处于活动状态，就会应用一些规则。只有一个用户可以在任何时候共享他们的屏幕，并且共享屏幕的用户在屏幕共享期间成为活跃用户，这意味着没有其他摄像头供稿变得突出。
- 要停止屏幕共享，请选择停止屏幕共享(Stop screen sharing )按钮。这将结束屏幕共享，将通话恢复为标准视频通话。
在共享的松弛屏幕共享上绘图(Drawing on a Shared Slack Screen Share)
共享您的屏幕允许您向其他呼叫者显示屏幕信息。但是，如果您想让事情更具交互性，您（和其他调用者）可以直接在共享屏幕上绘图。这使您可以向观众注释或指出某些项目。
- (Slack)默认情况下启用松弛屏幕绘图。如果您（或其他人）想要开始在屏幕上绘图，请从提供的选项中选择绘图(Draw) 图标(icon)。
- 启用该选项后，使用鼠标、触控板、触摸屏或其他合适的界面设备在屏幕上绘图。如果您想阻止其他参与者加入，请选择“一起画”图标(Draw together icon)。当图标为白色时，其他用户可以在您的共享屏幕上绘图。
- 您还可以在屏幕绘图过程中更改笔的颜色。为此，请选择CTRL 键(CTRL key)（在 Windows 上）或Command 键(key)（在Mac 上(Macs)）。这将循环显示每种可用的颜色。
对松弛屏幕共享问题进行故障排除(Troubleshooting Slack Screen Sharing Issues)
如果 Slack 的屏幕共享工具不起作用，您需要解决问题。此功能可能无法工作的原因有很多，从缺少权限到错误配置的网络端口。
在 Mac 上启用权限(Enabling Permissions on Mac)
尤其是Mac(Mac)用户，可能会发现 macOS 的安全设置会先发制人地阻止任何共享屏幕的尝试。如果是这种情况，您需要授予Slack访问权限以在“(Slack)系统偏好设置”(System Preferences)菜单中记录您的屏幕。
- 要打开系统偏好设置(System Preferences)，请选择Apple 菜单(Apple menu )>系统偏好设置( System Preferences)。
- 在系统偏好设置(System Preferences)菜单中，选择安全和隐私(Security & Privacy )>隐私( Privacy )>屏幕录制( Screen Recording)。在右侧，确保启用了Slack复选框。如果您无法更改此设置，请选择菜单底部的锁定图标。(lock icon )
打开 Slack 网络端口(Opening Slack Network Ports)
Slack桌面应用程序需要打开某些端口才能正常进行视频通话和屏幕共享。(Slack)特别是，传出流量需要UDP端口 22466。(UDP)如果这不可用，Slack将尝试回退到TCP端口 443，这是大多数互联网连接网络上应该可用的默认HTTPS端口。(HTTPS)
但是，默认为端口 443 可能会导致问题。如果您的Slack通话质量低，或者您无法以合理的分辨率共享屏幕，您需要将防火墙配置(configure your firewall)为打开端口 22466 ( UDP ) 和 443 ( TCP )。Windows 用户还需要配置Windows 防火墙(Windows Firewall)以允许Slack访问 Internet。
- 为此，请右键单击“开始(Start)”菜单并选择“运行”(Run)选项。
- 在“运行”(Run)框中，键入control firewall.cpl并选择“确定”。(OK.)
- 在Windows 防火墙(Windows Firewall)菜单中，选择允许应用程序或功能通过 Windows Defender 防火墙(Allow an app or feature through Windows Defender Firewall)。确保选中Slack(Slack)应用程序旁边的复选框以启用Slack通过防火墙的访问。如果您在公共或专用网络上，请确保这些类别中的复选框也已启用。您可能需要先选择更改设置(Change Settings)按钮。
考虑替代方案(Consider Alternatives)
如果Slack屏幕共享仍然无法在您的 PC 或Mac上运行，您可能需要寻找替代方案。存在许多屏幕共享工具，包括Mac 用户的 Facetime(Facetime for Mac users)和跨平台用户的 Zoom(Zoom for cross-platform users)。
您还可以使用 Google Duo 等应用程序在运行 Android 的移动设备上共享您的屏幕。(mobile devices running Android)大多数主要的视频会议应用程序(major video conferencing apps)都支持屏幕共享，但如果您在Slack上遇到连接问题，您可能需要先解决这些问题，包括切换到更好的互联网连接。
虽然Slack和其他平台可能使用不同的方法来建立视频和屏幕共享呼叫，但它仍然需要稳定且经过适当配置的网络连接（包括开放端口）才能使呼叫正常工作。
开始使用 Slack(Getting Started on Slack)
如果您是具有有效付费计划的Slack工作区所有者，您将可以完全访问(Slack)Slack必须提供的所有功能。但是，免费的Slack用户仍然可以使用许多功能。例如，如果您想提高免费Slack工作区的工作效率，您可以考虑将 Slack 机器人添加(adding a Slack bot)到您的频道中。
这些将帮助您将 Slack 变成第二个大脑，让您可以利用日历集成(calendar integration)和记笔记（以及其他技巧和技巧(other tricks and tips)）来充分利用该平台。如果你正在寻找Slack的替代品，你可以试试Microsoft Teams或Discord 。
How to Set up and Use Slack Screen Sharing
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You can share your screen on Slack using the web client or the desktop app, but you’ll need to upgrade to a paid Slack plan first. If you’re looking to set up and use Slack screen sharing, here’s what you’ll need to do.
How to Set Up Slack Screen Sharing
Before you begin to use screen sharing on Slack, you’ll need to be aware of a few things first.
Unfortunately, certain features (such as voice calling and screen sharing) are only available on Slack if your workspace is on a paid plan. If you’re the workspace owner or administrator, you’ll need to upgrade to a Standard, Plus, or Enterprise plan with a per-user or individually quoted cost before you (or your users) can screen share.
You don’t need a working camera for screen sharing to work, but as screen sharing is a component of a voice or video call, it could help you to present to your audience. At the very least, you’ll need a working microphone to set up a voice call and communicate with the other participants.
To use all of the screen sharing features on Slack (such as on-screen drawing), you may need to install the desktop app. While you can participate in a Slack screen sharing call in your browser, only the desktop app for Mac or Windows offer the full set of features for users.
How to Share Your Screen in Slack
To share your screen in a Slack workspace, you’ll need to initiate a new video call.
- To do this, open the Slack app or open your Slack workspace in your browser. In a direct message, select the Call button in the right-hand panel to begin a call.
- You can also start a new call in a channel by clicking on a username, then selecting the Call button in the pop-up. Confirm you want to start a call by selecting the Start Call button.
- Once you’ve established a new call, select the Screen Your Share button from the options at the bottom. If you have more than one monitor connected to your PC, you’ll need to select which one to share from the options provided. This will allow you to share specific apps in one screen, leaving the other screen private.
Once Slack screen sharing is active, a few rules apply. Only a single user can share their screen at any one point, and the user sharing their screen becomes the active user for the duration of the screen sharing, meaning no other camera feeds become prominent.
- To stop screen sharing, select the Stop screen sharing button. This will end screen sharing, returning the call to a standard video call.
Drawing on a Shared Slack Screen Share
Sharing your screen allows you to present on-screen information to other callers. If you want to make things more interactive, however, you (and other callers) can draw onto the shared screen directly. This allows you to annotate or point out certain items to your audience.
- Slack screen drawing is enabled by default. If you (or others) want to start drawing on-screen, select the Draw icon from the options provided.
- With the option enabled, draw on-screen using your mouse, trackpad, touchscreen, or other suitable interface device. If you want to stop other participants from joining in, select the Draw together icon. When the icon is white, other users can draw on your shared screen.
- You can also change the color of your pen during the on-screen drawing process. To do this, select the CTRL key (on Windows) or Command key (on Macs). This will cycle through each of the available colors.
Troubleshooting Slack Screen Sharing Issues
If Slack’s screen sharing tool isn’t working, you’ll need to troubleshoot the problem. There are a number of reasons why this feature might not work, from missing permissions to misconfigured network ports.
Enabling Permissions on Mac
Mac users, in particular, may find that macOS’ security settings preemptively block any attempt to share your screen. If this is the case, you’ll need to grant Slack access to record your screen in the System Preferences menu.
- To open System Preferences, select the Apple menu > System Preferences.
- In the System Preferences menu, select Security & Privacy > Privacy > Screen Recording. On the right, make sure that the Slack checkbox is enabled. If you can’t change this setting, select the lock icon at the bottom of the menu.
Opening Slack Network Ports
The Slack desktop app requires certain ports to be open for video calls and screen sharing to work properly. In particular, UDP port 22466 is needed for outgoing traffic. If this isn’t available, Slack will try to fall back onto TCP port 443, the default HTTPS port that should be available on most internet-connected networks.
Defaulting to port 443 may cause issues, however. If your Slack calls are low quality, or if you’re having trouble sharing your screen at a reasonable resolution, you’ll need to configure your firewall to open ports 22466 (UDP) and 443 (TCP). Windows users will also need to configure Windows Firewall to allow Slack access to the internet.
- To do this, right-click the Start menu and select the Run option.
- In the Run box, type control firewall.cpl and select OK.
- In the Windows Firewall menu, select the Allow an app or feature through Windows Defender Firewall. Make sure to select the checkbox next to the Slack app to enable access for Slack through the firewall. If you’re on a public or private network, make sure the checkbox in those categories are enabled, too. You may need to select the Change Settings button first.
Consider Alternatives
If Slack screen sharing still doesn’t work on your PC or Mac, you may need to look at alternatives. A number of screen sharing tools exist, including Facetime for Mac users and Zoom for cross-platform users.
You can also share your screen on mobile devices running Android using apps like Google Duo. Most major video conferencing apps support screen sharing, but if you’re having connectivity issues on Slack, you may need to troubleshoot these issues first, including switching to a better internet connection.
While Slack and other platforms may use different methods for establishing video and screen sharing calls, it will still require a stable and suitably configured network connection (including open ports) to allow the call to work properly.
Getting Started on Slack
If you’re a Slack workspace owner with an active paid plan, you’ll have full access to all the features that Slack has to offer. There are still plenty of features available for free Slack users, however. For instance, if you want to improve productivity on a free Slack workspace, you could think about adding a Slack bot to your channels.
These’ll help you to turn Slack into a second brain, allowing you to make use of calendar integration and note taking (along with other tricks and tips) to get the most out of the platform. If you’re looking for alternatives to Slack, you could give Microsoft Teams or Discord a try instead.
