Do I have to use IMCE?
No. Acquia Cohesion allows the site builder to select, either use of IMCE or Entity browser for browsing and selecting images.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
No, you cannot use SCSS variables in your codebase inside the Acquia Cohesion interface.
The 'Range' in the menu list item element sets which list items at the current level the settings should apply to.
To use an SCSS variable, enter your chosen variable into the appropriate CSS property.
Running the composer update command will update any composer packages that have newer versions available.