Can't add Spells from Compendium - PC Sheet drops behind window and can't drop spell

Title pretty much says it all.  Trying to add spells from compendium but my character sheet disappears behind the browser window as soon as I click on the compendium.   Any suggestions?   I have two monitors, if I move my character sheet to the other monitor I am unable to drag the spell from screen to screen.  Spell won't leave the browser window.

not sure it's even possible to drag-n-drop from compendium when you have sheet in a separate window. Try pop it back in for the spell addition.

Thank you but for some reason my character sheet auto pops out to new window when I open it.

You have an option in game settings enabled that automatically pops out the character sheet.  Uncheck that option.

Thank you very much!!  Its been quite a while since I played.