# XMAPortal : How to edit an existing trial
If you want to edit the metadata for one single trial we recommend method A below. If you have multiple number of trials that you would like to edit the metadata for, then we recommend method B *(Notice only users who are Study PI(s), LabAdmin and Study Leader for a study have access to method B)*
**Method A : Edit one single trial metadata**
Editing of trial metadata is requested through a jQuery pop-up menu that shows up when you hover with your mouse over the tables.
Please click on the picture below to see an animation that shows how to edit the metadata for an existing trial. *Do Shift+reload page to start the animation from the beginning.*
**Method B : Edit multiple trials' metadata (*****Notice only users who are Study PI(s), LabAdmin and Study Leader for a study have access to this task)***
Since Jan 10, 2017 we also offer a method to edit multiple trial metadata. Please click on the picture below to see an animation that shows how to edit multiple trial metadata. *Do Shift+reload page to start the animation from the beginning.*
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