Insert Picture from a file is common task on word processor. Especially if you need to deal with a lot of pictures (e.g. software manual with screenshots). So it would be nice if Writer has a keyboard shortcut for "insert picture" command (equivalent to Insert > Picture > From File) I think Ctrl+Shift+P (for Picture) is still available.
LibreOffice has easy assignable Shortcuts. Just do it yourself: 1) open Writer, Calc or Draw, 2) Tools > Customize > Keyboard 3) up right select LibreOffice radiobutton (so the scope is all apps) 4) under Shortcut Keys select Ctrl+Shift+P (or your preferred Combo) 5) under Category choose "Insert" 6) under Function select "From File" 7) Click Modify button 8) Click OK Attention, in 3.5.3 there seems to be a bug: After assignign the key, you must leave the application and open a different (so if you did this in Writer, just open Draw once and test your Combo there, thereafter you can open Writer again and the Combo will work here too. This way you can assign shortcuts to many commands, but not to all.