HELP!! Text box resizing issue in whiteboard

When I share a whiteboard in a meeting, most of the text boxes kind of cut off at the bottom. When I double click on one, all the text appears, but the formatting changes - the text boxes become 'long' if I can say that. And I can't resize them properly - it just won't go into the shape I want and the text size changes as well. I make sure to manually select the font size, but no luck. Please help!