Fenètre mesures

Je n’arrive pas a écrire des côtes dans la fenètre mesures , je n’arrive pas en sélectionant une aréte pouvoir lui donner la mesure que je souhaite

this is somewhat cryptic, can you give more information or better still, upload model or example

If you are dealing with a group or component, you need to go into its editing context to select any of its single entities like an edge.

Otherwise, (if I’m wrong), do like @pcmoor says, elaborate and/or upload the file here please.