"How to convert..."
There is no dimension convert method in AutoCAD but using replace method.
BTW it may be off topic...
I may be wrong, but guess the aligned dimensions are created by someone else and you want to "convert" them by a few clicks.
If this is the case, the answer may be "no" in practice.
Because the "convert" is not any kind of magic but is actually replacing the aligned dimensions with rotated/linear dimensions. It can theoretically be done by
1. manually replacing the aligned dimensions, or
2. using a piece of add-on (e.g. LSP)
Whatever choice you make, you end up manually repositioning the dimension lines of rotated/linear dimensions.
IMO you may keep them with no changes if the "convert" is not necessary.
Hope this explains/helps.
Please mark "Accept as Solution" and "Like" if my reply resolves the issue and it will help when others need helps.
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A circle is the locus of a cursor, starting and ending at the same point on a plane in model space or in layout such that its distance from a given coordinates (X,Y) is always constant.
X² + Y² = C²