Canvas size lock ratio

[danat48653852]

Hey guys,
I am looking for a way to change a canvas size just by inputting one of the dimensions (width or height) and then I want Photoshop to automatically calculate the other side of the canvas keeping the ratio of the image, just as it would do in Image size.
I need that so I can make an action for many images with different dimentions on which i want to make the small side of the canvas 500px and then Photoshop autoamatically to calculate the other side of the canvas because all the images are different sizes.

[c.pfaffenbichler]

Increasing the Canvas proportionally can result in newly created edges of different widths on the two sides.

Are you sure you don't want to use Canvas Size set to »Relative«?

[Bojan Živković]

So you have images which are smaller and you want to increase canvas size proportionally based on image orientation where smaller side should be 500px?

[danat48653852]

exactly. I found another solution but I would be happy to hear if you have one including the canvas size options.

[Bojan Živković]

No, I do not. I have the solution with conditional step and fit image.

[danat48653852]

Let me hear it, mine is different

[Bojan Živković]

I will let you play it Canvas Size 500px.atn - Google Drive Play action smaller side 500px. Increased canvas size will be white color (Background layer filled with white). You can add step to delete/hide Background layer if all your mages are RGB as it is expected. Action is recorded with thought that indexed color images may be present. In that case action will increase canvas size which will be filled with white.