Light box setting issue

1. As you said before if i want my gallery‘s layout is fixed every time after reload the page, should i use Justified Gallery？ if so …
my gallery combines with 7 photos. I want my gallery box size of layout like Mosaic box but not Justified box(photo size too big and arrange one bye one)… What figure should I put into [Random Justified Gallery – Minimum Tile height] column?

If you want a reasonably fixed layout you have to use Justified Grid, but you cannot escape getting images in a single column on mobiles if you do it. I wonder why you don’t want it though: on a mobile if you present very small thumbnails it reduces usability because users will not be able to click on individual thumbnails (this is typical responsive behaviour – making things usable on mobiles). You can set a very small size for your tiles to avoid single column layouts, but then even on desktops you will get very small tiles, which again would be undesirable.

2.the 2nd gallery box height is not showing normally , sometime the layout of (two car staff photo) showing at the bottom scale is abnormal… Do I need to set a max-height in CSS?

Not following you. I am seeing no issues with it. Can you provide a screenshot of what you are seeing?

Consider this:

1. All your pictures in this gallery have a “landscape” orientation
2. You have set your “minimum tile height” to 400px, which means you are not allowing any photo to be less than 400px tall.
3. You have set your gallery to be a maximum of 500px. Since you have no “portrait” orientation photos, and each landscape photo should be displayed with at least a 400px height, you will never get more than 1 photo in any line

You have two options: you can remove the max-width setting, or you can reduce the minimum tile height to something like 150px.

I personally am not in favour of either option – one leaves a lot of space on the screen and the other creates really small thumbnails, but you understand your site’s visitors the best.

The max-width setting is what you put into the Additional CSS.

You have defined the minimum tile height is in Photonic → Settings → Layouts → Random Justified Gallery – Minimum Tile height, as per the first post in this thread.