Consider this example, inspired by @Lupp’s answer.
=IF(1=1;IF(1=2;IF(1=2;IF(1=2;3;4);5);IF(1=2;3;6));IF(1=2;3;7))
The cell-grid area of Calc looks like this (notice the bold )
). That’s helpful for medium-complexity formulas but not so good for large, ugly ones.
![Calc paren matching](https://ask.libreoffice.org/uploads/asklibo/original/2X/f/fa0aac4ba412dc4e44ce344d216d298e49c2dc70.png)
Selecting part of a formula and pressing F9
shows a partial result.
![partial result](https://ask.libreoffice.org/uploads/asklibo/original/2X/9/98522390c9d188407380770ff861d1fdb3d89e24.png)
For large formulas, I typically copy and paste the formula into my favorite text editor. Not only does it show the match more clearly, but one keystroke (%
) can jump to the other matching paren.
![gVim paren matching](https://ask.libreoffice.org/uploads/asklibo/original/2X/0/00cf2a7304778bc1462fe92801e4c0450214e68e.png)
Indenting also helps.
![indented in text editor](https://ask.libreoffice.org/uploads/asklibo/original/2X/e/ee0aea09294b2898aa8f5ef057fa8abd78d4632b.png)
Presumably, other editors such as Notepad++ or Emacs could be used in the same way.