I am using Powerpoint 2016 to create an academic poster. I defined rounded-rectangle textboxes to hold the contents of each of the different sections (Introduction, Methods, etc), and have divided each textbox into 2 or 3 columns for optimal text layout.
Normally, when text that I type reaches the bottom part of the textbox, it is pushed forward to the start of the next column, but sometimes (randomly, seems to me!) text is intead pushed down beyond the lower margin of the textbox, as you can see here:
The settings of the textbox are as follows:
I've fiddled with these and other settings, but I could not change this behavior. Resizing the textbox doesn't help, nor does changing the autofit/shrink/wrap options under ShapeOptions|Size&Properties. Any idea how I can prevent text from overspilling out of the borders of the textbox?