Actually, I would find it annoying if it worked like that automatically without telling the user so.

How about a dialogue on pasting of content > rows or an option in the settings?

I can see more drawbacks than benefits from dynamically resizing patterns. Is there really any (practically relevant) situation where you'd need to paste a single pattern and possibly extend its length?
However, there are already several alternatives:

• If you copy more than one pattern from another module, the sizes of each pattern will remain the same anyway
• You can use overflow paste to continue pasting in the next pattern when the end of the current pattern is reached.

I see that you two got some good ideas! But what I really wanted is the Pattern Length, Size and Rows to be extended when pasting another module which is not seen on any early version of OpenMPT! But what if that same thing I pasted doesn't extend the length and size of the pattern? I would possibly think they won't work and if I copy one long pattern from one module (e.g. 256) to another (e.g. 64) it would overflow instead of extending the pattern length. REALLY REALLY ANNOYING! I would love to have this feature where the pattern length should be extended. BTW, It should say Length and Size not Rows! The title was my mistake! The feature I am requesting for is called "Extend Paste", which in this case, if "Overflow Paste" does not work, "Extend Paste" will extend the Pattern Length and size so that it's more suitable, for example, from a long 256 row module being pasted in a 64 row module being extended. That's what I'm looking for in the next version! :D

Also keep in mind that there is a limit of 1,024 rows in each pattern. Therefore, copying more than 16 patterns at a time would require the use of the overflow paste function even after the expansion.