In Affinity designer box selection currently selects objects that are fully inside the selectioin box by default. This can be changed to select objects that pertially intersect with selection box in preferences.
My request is to make Alt key temporary invert selection behaviour, so if you have default options, you can hold Alt while making selection box to select objects that intersect with selection box, and if you enabled alternative behaviour in preferences, holding Alt lets you select objects thet are fully withing the selection box.
Currently holding Alt while selecting objects doesn't do anything.
