When many objects occupy a small space on a plan, it may become crowded with measure tooltips, making the plan uncomfortable to read.
For a better canvas readability, you can decide to display the measure tooltips, or not. Just check or uncheck the "Show measure" checkbox for each group in the Properties panel.
NEW SHORTCUT : To hide all measure tooltips from the plan at once, press the keyboard shortcut "M". Press the "M" key again to make them reappear.
This function is also available from the contextual menus:
NOTE : If, for any given group of objects, the "Show measure" has been set to "no", the "M" key will not make the measure tooltips reappear.