What is point to point pin assignment in Quartus assignment editor?

You can visit the following links to see if can find anything useful:

https://www.altera.com/support/training/catalog.html

https://www.altera.com/support/training/course.html

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By the way, where do you come across point to point assignment? I am not aware of this assignment. Anyway, for input and output pin in your design, you would need to do the right pin assignment to ensure it is placed on your desired pin. You can try to search Altera web to see if there is any online training on basic QII.

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In the assignment editor, you have "from" column and "to" column, so when you specify nodes for both columns, this is a point to point assignment yes?

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In the assignment editor, you have "from" column and "to" column, so when you specify nodes for both columns, this is a point to point assignment yes?

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Altera engineers have done their GUI for assignment editor that way; a spreadsheet table containing "from" column and "to" column. The two columns only apply for a path with source/destination. But for some assignments it doesn't make any sense obviously such as pins as you found out in which case one column applies(to). There are many others e.g. current strength or io standard. So it is matter of fitting in and a lazy shortcut from Altera's GUI engineer.