Maryam Salehi

Hi, I have a problem with the viewport. When I want to create a viewport in my design layer. Basically, I create a rectangle and then open the "Create Viewport" menu from the "View" dropdown menu. In the dialog box, I haven't changed anything and left the default settings, then I hit "OK". Usually, after I hit "OK", it goes to the sheet layer and the viewport is there. But this time, when I hit "OK", nothing changes and it doesn't go to the sheet layer.