Hi,
>> How to create a hidden comment for an item
For blocks you can create hidden attributes, for other objects (as long as you are working based in Vanilla AutoCAD) I don't see a chance (besides of development of a plugin) to attach something to an object. A text on a frozen layer might help.
>> How to make a hyperlink between headings in one project
You can create a view for any window in your drawing (in modelspace as well as in layouts). When you then create a hyperlink you can address such a view.
![20170520_080823.png 20170520_080823.png](https://forums.autodesk.com/t5/image/serverpage/image-id/358260i70B6E4450A0DC10C/image-dimensions/408x282?v=v2)
HTH, - alfred -
------------------------------------------------------------------------------------
Alfred NESWADBA
ISH-Solutions GmbH / Ingenieur Studio HOLLAUS
www.ish-solutions.at ...
blog.ish-solutions.at ...
LinkedIn ...
CDay 2024------------------------------------------------------------------------------------
(not an Autodesk consultant)