Selecting all from a tag/pack at once

When you click the hamburger menu on a stamp, it gives you the options for selecting all, all stamps like this or all stamps in this set. But what if there was a way to select all stamps from a pack or tag of stamps? Like, if I wanted to group an entire ruin made entirely of the ruin tag, I could select all ruin-tagged stamps with a few clicks. Unfortunately, I can't add a screenshot to demonstrate my point, because when I press command, the hamburger menu disappears.