[Therion] Fwd: PDF output: layers nested?

[Benedikt Hallinger]

Thank you Martin, for clarification!

> Am 30.11.2021 um 20:49 schrieb Martin Budaj <m.budaj at gmail.com>:
> 
> On Tue, Nov 23, 2021 at 4:42 PM Andrew Atkinson <andrew at wotcc.org.uk> wrote:
>>> On 23/11/2021 15:08, Benedikt Hallinger wrote:
>>> 
>>> I don't know PDF specifics, but it would be very handy to have "nested" layers, i.e. submaps as separate layers in the main layer.
>> 
>> That would be very useful, don't know if it is possible
> 
> There is some support for a tree-like hierarchy of the optional
> content layers in the PDF specification, but you can't select/unselect
> a group of sublayers at once. See the attached picture for an
> illustration: you can change the visibility of the lowest-level maps
> (the "leafs") only, not the higher-level maps or groups (the
> "branches"). So it's not very helpful in this case except for having
> some labels indicating the hierarchical structure of maps.
> If all the tree was interactive, we could simply expand it to all
> sub-maps to have complete and easy control of the displayed content.
> 
> Martin
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