So assuming my subject line is not clear, time to time I have difficulty to make sure my horizon line is really horizontal and building are vertical. So what do you do to make sure the lines are correct? How do I make sure my easel is correctly aligned with those lines?
For focusing, I place a sheet of scrapped enlarging paper in the easel, back side up. I usually draw several lines across the paper in both directions and use those to help orient verticals and horzontals in the image.
And, your eye is really good at assessing this as well. If a test print looks skewed, then correct. Usually you'll have a couple of chances to get it right before arriving at the right exposure, contrast and manipulation scheme anyway.
But I find my eye's are plenty good enough when making prints. I do, however, have trouble keeping the horizon horizontal when taking slides so my cameras are equiped with gridded screens (Nikon E-Screens).
Me, too. I make my own, with 1/2" squares. But that's the general idea. The paper also serves the purpose of setting the easel blades for various cropping/aspect ratios.
Thank you all. Easel blades were my plan to use but then graph paper idea came. I was searching for an adhesive option and then found transfer paper on Amazon, bought a roll and tried. The result is not too bad.