When dividing a heading in an outline, it should be divided into "two or more parts".
Each heading ought to be isolated or divide into at least two or more parts.
For example;
COMPILE RÉSUMÉ
List applicable coursework
List work involvement
Rundown volunteer involvement
(The heading "COMPILE Résumé" is partitioned into 3 sections.)
In fact, there is no restriction to the quantity of subdivisions for your headings; in any case, in the event that you appear to have a ton, it might be valuable to check whether a portion of the parts can be joined.
The way of developing and arranging ideas formally is referred to an outline. To see if the ideas are connecting with each other and to help organize the ideas is the purpose of an outline.
Hence, when dividing a heading in an outline, it should be divided into two or more parts. For instance, "Compile Résumé" , should be divided into three parts i.e, list of work experience, relevant coursework, and volunteer experience.