Photoshop: How to draw a guide with an exact distance from another guide

Before drawing, I want to draw all guides for my layout. For example, I have a guide line named A already. After that, I want to have another guide named B parallel with guide A and at 50px distance from it.

I have three solutions:

1. Draw line B and by "some way", I can see the current distance directly when I'm drawing, so I can make the distance exactly what I want it to be.


2. Draw line B. And then I use the Ruler tool to see the distance between the two guides. This method has disadvantages: maybe the ruler line that I draw isn't perpendicular with the guides and I'm not sure when the distance is enough.


3. There are other clever ways, that help me get this job done fast and easily, but that I don't know yet. I think Photoshop should support this feature.

What is the best way to achieve this?

Answer

Photoshop CC has a new feature called "New Guide Layout" that is probably what you're after. View > New Guide Layout:

The alternative, and what I still am likely to do is setup a guide. Then use the rectangular marquee to determine size. Say you want 150px, I changed Marquee to Fixed Size and width 150px (can see this on top bar):

Snap left side to guide. Then add next guide:

Use arrow tool to easily move the marquee to next guide:

and repeat:

This is also useful if you don't have set measurements but want to make things even. Marquee from the edge of the document to a particular point then move the marquee to the opposite edge to set up both sides.