# Comparing with the current build

To compare a crosscutting map file with the current build:

1. Select a file with the ".ajmap" extension in the Package Explorer.
2. Right click and select AspectJ Tools > Compare Crosscutting With Current Build.

The results of the comparison are then shown in the Crosscutting Comparison view, which is opened in the current perspective if it is not already showing.

When the Crosscutting Comparison view is used to compare a crosscutting map file with the current build it will update automatically with every subsequent build. This provides an ongoing view of how the crosscutting relationships present in a project are changing in response to code changes in the project.

Saving crosscutting information
Comparing two builds