If you click a roll from your character sheet, go to your chat input field and press the up cursor key. That will display the last command given, as sent from the sheet. Copy that text. That command can be used to create a macro in your Collections Tab , or an Ability on your character sheet. Either one of these can be placed on the macro bar by clicking the "In Bar" button next to the name in the Collections tab, or the "Show in Macro Bar" button on a Character Ability.