How to get the height of a layer from the layers pannel

Forum|Forum|6 years ago
March 20, 2019
3 replies
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I found that the height of the layers is different for different canvas sizes,This is a layer height About 41 pixels and width:height=1:1.

The data are irrelevant,oh,I just want to get the layer height,please help me !

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Correct answer Trevor.Dennis

yes,That's about what I mean,the hard part is I don't know the rules, and I don't know how to compute it.

龚亮g64532194 wrote
yes,That's about what I mean,the hard part is I don't know the rules, and I don't know how to compute it.

It's straight math. If the thumbnail is set to Large, and the document is 1000 X 800 pixels, then the layer height will be:

800 / 1000 = 0.8 so 78 (width in pixels) X 0.8 = 62.4

You monitor can't show fractions of a pixel, so I'm guessing that the thumbnail would be 78 X 62 pixels

If the document was 800 X 1000 pixels, the thumbnail height is going to be 78 pixels so, in this case, the thumbnail width will be 62 pixels.

You can test it using screen shots and pasting into Photoshop.

Zoom way in so you can see the pixel grid, and drag a selection around the thumbnail.

The heads up will show the pixel size.

In this case you can see my estimate was one pixel out in one direction, and half a pixel in the other. I suspect this will be always be repeatable and predictable.

[EDIT] I have just realised that you have an Excel screen shot in your first post, so you could make a very simple worksheet to give you those sizes.

grelessAuthor

Inspiring

It's maybe only adobe developers know this calculation rule

JJMack

Community Expert

Even if you know the rules the Layer Palette itself is not fixed will change by some editing of the document features and users have options that they can customize the view for their use of the palette. Thumbnails aspect ratios are the same as the Documents or Layer bounds aspect ratio aspect ratio if displayed and will be fitted to one of three size area choices and the contents can bet relative to the layers bounds or document canvas. All of which is changeable with layer palettes options

JJMack

grelessAuthor

Inspiring

the actually,i mean to the height of every layer item in Layer pannel,That's my result,the layer Item height range is 23~40 pixels

JJMack

Community Expert

Layers can be any size except for Photoshop Background layer it does not support transparency so it will always be Canvas size. You can not get the layers size from the layer Palette. You can get a layers bounds with a Photoshop script. From Photoshop's UI you can target a layer in the layers Palette then use ctrl+T free transform to see where the layer bounds are. Free transform bounding box will snap to the layers bounds. You may nee to zoom way out to see a layer bound when the layers the has pixels that are off canvas. The is also information in the tool option bar where the center anchor point relative to the canvas the with and height perhaps an angle. A layer like a smart object layer can also be warped and distorted and has smart filters.

A Photoshop script could be programmed to write a text file that list a document current layer names and their current bounds. These of course can be change they are changeable. Adobe Photoshop Scripting

JJMack

grelessAuthor

Inspiring

thanks ,i doesn't need layer bounds but actual layer height in layer pannel.

JJMack

Community Expert

Layers can be any size and shape the layers bounds are rectangular a layer's max width and max height. These can be change with processing. If you transform a layer you change its size its bounds change. If you add text to a text layer it size changes. If you paint in an empty area on a layer it bounds may change. Only a background layer is fixed to the canvas size and a document canvas size can be changes using canvas size.

Photoshop does not display and size information in the layers palette. Size information is in the layers data you can get that information via Photoshop scripting.

JJMack