How to add Attachments button on a new form

Step 1. Open your form in AOT and Go to from Design node.

Step 2. Add new button group under ActivePanTab.

Step 3. Add new command button under this new button group.



Step 4. Set following properties of this button



Now you need to do one functional setup for this new customization

Step 5: Open below from
 Organization administration/SetUp-> Document Management -> Active Document Table 

Step 6: Add your table details here and click on Always enable.



Step 7: So its done now.
Open your form and click on Attachment button , below form must open.