...which explained how to use the arbitrary Rotate Canvas option in Photoshop very quickly to straighten horizons...
There was something about drawing a line across the horizon, then selecting the arbitrary rotate command, and Photoshop would automatically calculate the direction and degree of rotation required to straighten the horizon to the line drawn.
I tried it at the time and it worked but I've obviously mis remembered how it worked!
Can anyone help?
PS Only when looking through old tips and tricks did I realise, I think the thread titles when people kindly give tips need to be specific to the tip contained - it's no good just putting Tip 1 and the date because I certainly can't remember what date a particular tip was shared or what order it was in!
:) I'm very grateful that they are posted at all though! :)
From the toolbox go to the eyedropper and hold the cursor there for a short time until the menu flies out. At the bottom of this menu there is an icon of a small ruler called the Measure Tool. Click on this.
Now move the cursor over your image. It has become a cross hair. Position this over one end of your horizon and left click and hold. Move mouse or pen across horizon to another point as far as you can. Let go with the left click on the mouse. You will now have a line drawn on your picture. This is only temporary.
Now select Image > Rotate Canvas > Arbitrary you will see a little box which will show you an angle and a spot in either the Clockwise or the Anticlockwise circle. If you press the OK box your horizon will become horizontal.
It doesn't need to be a horizontal line. It works just the same by drawing a vertical line. You can even go corner to corner on a square image to rotate it into a diamond shape. I often use this tool to make sure that building lines are straight.
Yup, I know re the vertical horizontal thing - I was actually thinking horizontal because I was correcting a horizon. But when I first encountered it I used it on an upright too!
Oddly enough it was actually true but because it was a sand dune at an angle it didn't LOOK true.
In the end I decided rather than make it falsely horizontal that it looked better rotated further off horizontal...
