As not all component dimensions are needed on the screen, to prevent visual clutter, you can set less critical dimensions not to appear.
Setting dimensions as non-viewable (hidden)
The next time you right-click and check Show Dimensions, the dimension will not appear on the screen.
Setting component dimensions as non-viewable (hidden)
All the dimensions in the component appear on the screen.
Next time you right-click and check Show Dimensions, the dimension line will not appear even when Hidden Objects on the global Show menu is checked.
NOTE: After you have selected the component (Step 1), as an alternative for Steps 2 and 3 you can also click Dimensions on the contextual edit bar, and then consecutively check Dimensions and Hidden Objects in the drop-down menu that appears.