Two questions about HelpViewer

Hello,

I have two questions about HelpViewer:

1) About Encoding

While working on a localized release of the User Guides I made first 
in English to be read  within HelpViewer (i.e.: 'AGNoStep User Guide', 
'GWorkspace User Guide') I noted this issue: despite .xlp files are 
known as xml format, UTF-8 characters are badly rendered.

I tried also to add some rule at the begining of 'main.xlp', before 
the '<document>' tag, but without success, like:
> <?xml version="1.0" encoding="UTF-8"?>

2) What the Bookshelf button is expected to do? Opening a FileViewer 
window in some place? How to set the path, while the 'preferences' 
menu item is grayed? Is there a canonical place I should use to put 
into .help files?

Tried with latest HelpViewer 0.4 built from svn.

Regards,

-- 
Patrick Cardona - Pi400 - GNU/Linux aarch64 (Debian 13.1)
Xorg (1:7.7+24) - libcairo2 (1.18.4-1+rpt1 arm64)
Window Maker (0.96.0) - GWorkspace (1.1.0 - 02 2025) - Theme: AGNOSTEP 
- MUA: GNUMail (1.4.0)