If you add 'Activities (filtered)' to a new Section within the Knowledge form the Activity Journal information is not aligned correctly in the UI, such that the Activity Formatter button is obscured.
Steps to Reproduce
1) Go to a Knowledge Article record.
2) Configure Form
3) Create new section and add 'Activities (filtered)'
4) The Activity Formatter button is half obscured by the journal field.
This issue is caused by a conflict with the wiki field also being on the form. Remove the Wiki field from the Knowledge Form.
Related Problem: PRB1195784