Seems so. But you both do not provide useful information to support you properly.
You should post your LibreCAD version and operating system.
Post exact what you read in the GUI.
Post the exact tool name you use.
Step by step what you have already tried.
My assumption is, that you use Measure tool instead of Dimensions.
Measure tools are just informational. As the name says, to measure distances or angles in the drawing. The result is printed out in the command box history, no affect to the drawing.
The
Measure -> Distance Point-to-Point tool asks for:
Specify first point of distanceWhen
Dimensions -> Alinged asks for:
Specify first extension line origin
investing less than half an hour into Search function can save hours or days of waiting for a solution