can't turn off "snapshot" on adobe pdf

Been doing online work and had to use Adobe for that - not my preferred choice but HMRC UK forces this.

Option to save at end of work wouldn't work so decided to take snap shot of finished screen, went to Edit "take snapshot" and clicked - no snapshot taken that I can locate, and now the cursor won't show on that adobe page. I click on the adobe page and the cursor becomes crosshairs, and the page turns blue/burgundy - clicked again the colour goes but the page won't respond at all and crosshairs stay.

Tried to deselect snapshot under Edit by clicking on it again but nothin happens , the tick is still showing next to "take snapshot" - and I think this is why the cursor won't show and page not acting as it should. Anyone know how can I resolve this?