A comprehensive breakdown of composition objects that define text, options, and other features within blocks and elements| Slack API
The Web API is an RPC-style collection of methods that either yield information about Slack workspaces or allows your app to enact change within them. Learn how to formulate requests it will understand.| Slack API
Create user groups to notify groups of people at once, rather than mentioning each person individually. When you mention a user group's unique handle — for example, @designers — you'll notify e...| Slack Help Center
You can choose a display name to show when your coworkers mention you in Slack. If you don't fill in the display name field in your Slack profile, you'll see your full name when people mention you....| Slack Help Center
Another way to attach content to messages is the old attachments system. We prefer Block Kit now.| Slack API
A comprehensive breakdown of blocks used to lay out app surfaces.| Slack API
A guide to using the mrkdwn syntax for your app-published text in messages, modals, and tabs.| Slack API
A comprehensive breakdown of elements that add images or interactivity to blocks.| Slack API
Markdown| daringfireball.net