For point two, I prefer to store record Id in an invisible column or point the data property of the row to some object (the TMyData instance in your case)
Thank you for your answer. I miss the Visiblebuttons property .
1/ I have tried yesterday to create a small project without reproducing the issue. As I have arround 50 grids (40 NextGrid5 / 10 NextGrid6) and more than 100 forms it will take me some time to isolate issue. I'm quite sure I was not getting this issue before starting v6 migration.
2/ Issue is not about adding a page but adding a button or a label on the sheet. When I try to place any component on the sheet it ends on the form. I have to move it back to sheet with the form explorer as cut/paste is not working due to first issue. On my small demo this issue does not appear too. I suspect this to be directly linked with first issue. I will get back to you if I can isolate the issue.