How do I create a (custom) alignment guide in Pixelmator

Question

How do I add a custom/fixed alignment guide in Pixelmator? I know it's possible because I done it before and I'm working with a file that already has three, but I need to add one more. How is that done?

Answer 1

Found it: http://help.pixelmator.com/mac/3.2/#430

This is the procedure:

1. Select View > Show Rulers.
2. Do one of the following:
   • Click and drag any of the horizontal or vertical ruler bars and drop the guideline anywhere onto your image.
   • Double-click the horizontal or vertical ruler bars and choose New guide from the shortcut menu in order to open a Place a Guide sheet. Select a horizontal or vertical orientation and enter a position at which the guide should be placed. Click OK after you are done.
   • Hold down the Option key as you drag away from the vertical ruler in order to create a horizontal guide and vice versa.

Tip: Hold down the Shift key as you drag a guide to make it snap to the ruler ticks.

Answer 2

To the best of my knowledge the PXM Version 3.3.2 Limestone (50417) cannot create custom guides, but only regular straight ones.

My way to use any object as a guide is a relatively new feature "Lock layer" - I create thin lines/objects and lock them, thus they are used as a guides:

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The horizontal line is a regular guide of pxm, the diagonal - straight lines locked and used as custom guides.