Load the DevTest Portal and go to Monitor, Virtual Service Environment and select the VSE name.
It will show the list of Virtual Services deployed to the VSE.
For one of the Virtual Services Model deployed, select Inspection View under the Actions icon.
With DevTest 10.2, we can open multiple Inspection View for different Virtual Services.
When opening more than 1 tab, any 2nd, 3rd or additional tabs for Show Request Event Details or Show Matching, cannot be stretched in order to view the top pane in a larger view.
We may have a patch to address your issue, please open a support ticket and reference DE340063.
We will be happy to provide you the patch if it matches your issue.
This behavior is fixed with DevTest on release 10.3.