To modify the value of a row, you must first start the edition -> in the TOC, right-click on the layer -> Start edition
Then in the table of your layer, double-click in the value which you want to change. The cell becomes active and you can write the new value.
Remark : Be careful of the type of the field where you modify the value (ex: if the type's field is "integer" you can not enter text, ...)
Suite : Stop edition and save modifications
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