I write documentation in an IT department. I receive Visio files as input from other people. Sometimes there is curious behavior from these files that does not occur when I create a file myself. I'm wondering if there's is setting to control this. Here's what I'm talking about.

In my own Visio files, I use the Connector Tool to insert lines between boxes. I double-click on the line to enter a text label. The text label has a handle on it (a tiny yellow diamond) that lets me move the text anywhere I want.

In contrast, with the files I receive from others, the text label on a connector line has no handle. I cannot move the text anywhere. It's position is fixed wherever Visio puts it (usually in the middle of the line).

Can anyone tell me how to enable the handles for this text? Thanks.