How can I resolve not being able to access the OK tab on the text modification box?

When I try to change the text color through Upfront, the text color modification box doesn't always fully appear. Often I'm unable to see the OK tab and when I try to move the box so that I can see and access it, the box closes. I've actually had to move the text box to another portion of my screen in order to see the modification box in total. How can this be resolved?