What icon is used to exit a sketch while saving changes?

The correct answer is the blue arrow icon, which signifies the action of exiting a sketch while saving any changes made during the editing session. In SolidWorks, the blue arrow icon typically indicates a confirmation action, allowing users to save their modifications to the sketch and return to the previous work environment in one step.

Exiting a sketch with the blue arrow ensures that any geometrical adjustments, constraints, or other modifications are properly recorded before leaving the sketch mode. This is a vital step in the design process, as ensuring changes are saved helps maintain the integrity of the part or assembly being created.

In contrast, the other icons serve different purposes. The red X icon usually indicates a cancellation action, explicitly used to exit without saving changes, while the checkmark icon is often associated with confirming individual features rather than saving a sketch. The save icon typically relates to general file-saving operations rather than specifically exiting a sketch. Therefore, choosing the blue arrow accurately represents the process of saving changes while exiting a sketch in SolidWorks.