Is there an easy way to select text frames which are hidden under a myriad of other frames? No complicated workarounds, please, just an easy way if there is one. If there isn’t, there isn’t.
Hi @letku, if you happen to select multiple frames because they are near to another, you can then just press the arrow keys to navigate between them. To edit the content of a selected frame you can then just press Enter and then press ESC when you are done (to be able to edit the frame by pressing Enter, no control points should be selected: press TAB to circle between control point selection/deselection. If you instead need to edit the frame size, with a control point selected, you can change which control point is selected with the arrow keys, and then you can use the moving shortcuts):
And here to copy frames:
Gosh, after nearly 2 years using Dorico on a daily basis I really need to read the manual carefully! 
So important tool I just ignored till now.
Thank you:)
Grazie!
Di niente
Yes!: @Lillie_Harris has been doing a wonderful work on it.