Hello, I don't know if it works like on autocad, but on the latter you just have to type the command "SELECT" Then I type "REVIOUS", it reselects all the objects. But hey, I can't try on Draftsight, sorry.
Well done GM, I make my selection, I use the first command, I choose my second command and when it asks me which entities to select I just have to type P (for Previous) and here I am again.