Hi @v-micsh-msft,
Here are the steps I followed :
1. On the SharePoint List, select customize forms.
2. Create a field under CreateItemForm
3. Add a Pen input control, name it MyDoodles
4. Add a Button control, move it below MyDoodles, and set the Text property of the Button control to show Add.
5. Add an Image gallery control, move it below the Button control.
6. In the Image control of the Image Gallery, add ThisItem.Sketch in the Image property.
7. Save it and publish it.
When I try to create an item, the signature field works, but if I create another Item, the signature field is the same as the other Item and if I modify it, the all signatures of all the item change.
Could you help me ?
Thank you!!