Annotate on an ipad

[FamTa]

I use zoom for online tutoring. This afternoon I am tutoring a student who uses an ipad. I would like her to be able to annotate when I share my screen. I have enabled annotation in my account. I think I'm ok talking her through how to use annotate on her ipad - I've watched vids on youtube and it looks like the pencil icon should appear bottom left on her screen. My first question is is this right? And my second my question is, does she need to update to latest version of zoom before we start? And how would she do this? I know nothing about ipads. Thanks.