Did you know that you can "9-slice" in Axure RP? The Axure RP version of the feature is called "preserve corners".
Sometimes you've got an image button that you want to resize quickly, without remaking it using widgets and without ending up with a jaggy, distorted mess. Perhaps your button has a detail that makes it trickier to quickly rebuildmaybe something like this button I found on the download page of a certain industry-leading prototyping tool:
If I wanted to make this button wider to fit a long piece of text, stretching it horizontally would leave me with some distortion, like this:
Notice how the "reflection line" detail is skewed as compared to the original, and how the right border is now thicker than the top and bottom borders. Not great.
This is where the preserve corners feature comes in. Observe:
When you right-click on an image and select Preserve Corners, four dotted red lines