Just now, I clicked on the wrong button in the reopen review queue (I intended to vote for reopening, but instead I clicked "leave closed"). Irresponsible and thoughtless as it may be, this is the first time something like this happened to me. I immediately went back and tried to undo, despite remembering that I never saw an undo or revote option, but naturally couldn't do anything about it.
Is there a way to change my review decision once made?