@joseph_1979 First of all, thank you for your reply. Unfortunately, images in your post are again not showing.
However, I followed your instructions and I believe, you misunderstood subject of this whole forum thread and feature request.

You describe how to download all camera video footage at once by choosing "Playback" category, selecting "Download" and clicking "Select All" to download all videos taken during selected day.

This topic is about timelapse function - when set up to take pictures (not video), and about being able to easily download all image files (JPGs) taken during timelapse without the need of clicking every single one of them (can be thousands of images taken during 24 hours).
As of now, download screen for images taken during timelapse looks like this:


(Alternative image link: https://i.ibb.co/Qn9JyyY/reolink-timelapse-01.png)

If you want to download all images taken during certain day, you have to click and check every image one-by-one, which can be quite time consuming. For example, if the camera takes image every minute, there are 1440 images every day.
Simple "Select All" button or enabling "Shift+Click" to select multiple files would be great in this case.

@joseph_1979 I came across this thread looking for solving this exact problem. Unfortunately image you enclosed is not showing and I am unable to find the "Select All" button in Windows client app, even though you have stated it's available. Could you please point me in right direction? Thank you.