Hi @Vijay kumar S1 ,
The Activities are not a particular field; it is a formatter and renders the certain history content, not the record or fields in the record. If you include either the comments or the work_notes journal fields in any section of the form, the form layout shows the input areas for these items. But the PDF format shows the journal entries for each field.
If you want to have these two fields displayed together interleaved on your PDF, you need to add the Comments and Work Notes field to your form layout. But you will probably want to make a special view for this PDF, and remove the input areas for your Additional Comments and Work Notes fields, otherwise the information will show up twice.
Alternatively, you can add the Audit History as a related list. This will print the history records, so it is the same information presented in the Activities, just in a list format.
