Can't figure out how to select more than one item in any group

[1BUDLITE]

When in a group I want to select more than one item or all of them that I want to delete. It says "delete selected clip(s)" you want to delete but can't figure out how to select some items rather just one. Anyone got some suggestions? Thanks in advance.

[mouser]

hold control and click to select multiple items one by one or shift and click to select a range.
Or Ctrl+A to select all.