How to select multiple items without drawing a rectangle around a group of items in DevonThink?
For example the regular hotkey for that is CMD¹. If you hold this button for example in the Finder-Application you can now click every item at once or select multiple different item by drawing an rectangle around them. These items are then selected and you can release the key and move, copy, dupplicate, tag, these selected items at once.
¹ If an application is an lazy port of an Windows/Linux application the modifer can also be CTRL.
In DevonThink instead CMD opens the file (how much I dislike this behavior). CTRL toggles the context menu and SHIFT is just the range-selection.