The default navigation nodes count is 6, if Users want to adjust the number of nodes of navigation they can pass the parameter nav_max in their shortcode, the value must be within 2 and 15 range.
Example shortcode with navigation node count will be:
[post-timeline category_id="7" nav_max="5"]
You can also add a navigation limit from Short Code Generator Template. You can also Increase or decrease your navigation limit