it would be nice to let the user to save some custom query presets and have them as buttons at the bottom of the PACS query field table (let's say 5 or 6 presets would be enough to save).

I often find myself in the situation to do repetitive queries like:
- DR today
- MRI yesterday
- etc. etc.

the chance to save these presets and have them as easy access buttons to load the correspondent query would be a time saver.

it's like saving your favourite radio stations in you car stereo and assign then to buttons. any time you need them you click the button without having to go trough the frequencies.

I don't use the PACS function in Radiant (hospital doesn't allow custom DICOM clients), but what I find very useful in IMPAX EE is the ability to search for today's studies with typing 0 in the date field, 1 for today or yesterday, 7 for last week ...

Search presets will be implemented for sure.

a gentle reminder. :-)

Can I start with a preset automatically ("today" for example) every time I need PACS download?

I don't know if this can be achieved with a configuration tweak...
probably the devs have to implement this.

That's right. This has to be implemented yet.

Search presets are now available in RadiAnt DICOM Viewer 4.1.16 Beta