GIFs in Slack Workflow
Slack Workflows will feature GIFs, but large GIFs can be prevented from displaying automatically.
One's Slack Preferences determine if a GIF larger than 2MB displays automatically.
Display GIFs Larger than 2MB
1. Within Slack, click your profile picture in the top right.
2. Click Preferences.
3. Click Messages & media.
4. Locate the Inline media & links section.
5. Check the box "Even if they're larger than 2MB".