To combine size dimensions and geometric tolerances:
- Open a model with size dimensions and geometric tolerances to combine. For example, you can combine the three dimensions into one.

- Ctrl + select the two size dimensions from left to right.
- Right-click and click Combine Dimension.

The dimensions combine into one at the last selected dimension, with an instance count automatically added.
When combining only geometric tolerances, right-click and click Combine Gtol. When combining geometric tolerances, the applied symbols, tolerances, and datums must be the same.