LibreOffice Base 5 Documentation

Hello,
I'm working through the Sports example database in the draft 'Introduction to Base' document for version 5, and I have come to a standstill at page 23, which says:
First right-click on the table header of the data sheet. It says ID_sport. In the context menu, select Replace with > List Box.
The problem is that wherever I right Click on the field name in the grid I just get the menu with Copy, Paste, and Position & Size etc. on it.
The guide I am using is here:
https://wiki.documentfoundation.org/images/4/4b/BH5001-IntroductionToBase.pdf
and I am on version 5.0.4.2 on Windows 10.
I have put my Database on One Drive and this can be accessed here:
http://1drv.ms/1JRuSHH
I did post a question yesterday on the ask site, but its still sitting at awaiting moderation, and I was hoping to give this a go before having to go back to work.
Finally, how can I contribute to the documentation in terms of road testing or similar work?
Thank you in advance.
Peter JonesWest SussexUK

Hi Peter,

and I am on version 5.0.4.2 on Windows 10

This version is a littel bit buggy while using gridcontrols in a form.
With OpenSUSE you could only mark the whole gridcontrol, not the
header of a column. See
https://bugs.documentfoundation.org/show_bug.cgi?id=96482

There has been another bug before in 5.0 (moving the gridcontrol
crashed LO), which had been fixed - and after fixing the editing of a
gridcontrol is impossible.

I'm using LO 4.4.7.2 instead of any 5.0-version. It will work in this
part ...

Regards

Robert