How to enter a chord made up of three notes of different values

Hello,
As you all can see in this picture [extract of the sheets music], I would like to enter a chord made up of a 'minim' F, a 'quaver rest' A and a dotted crotchet C.

How can I do that with MuseScore?
I do know how to enter a chord but I do not know how to create one with multiple notes of different values

Hope you can help me out.
Thank you so much in advance.

~Francis