Font design is the process of iteratively testing the individual choices that collectively add up toa complete design. You will be testing your font to see if the combination of decisions you havemade:
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- Allows you to read the font
- Makes the font feel right to you
- Makes the font useful for the the jobs you want the font to be able to do.
As you test the design, you will have to trust your perceptions and design somewhat practically.Much of type design requires that you make letters similar and that you repeat forms.
It is tempting to assume that if you measure the parts and the spaces between the glyphs, then youwill get reliable results. While very useful, this approach has real limitations. You should expectto make adjustments if something looks wrong to you. Furthermore, you should feel confident thatmaking changes until it “looks right” is the correct thing to do.
The reason this is true is that there are a number of natural optical illusions that all readers aresubject to. These illusions must be accounted for by altering the shapes of letters until they lookright to you.
You can get a feel of where to look and what elements to adjust in these Type Review Videos (External Link)
Examples of illusions
Some illusions involve the perceived weight of lines, some involve the perceived length of lines,and others involve the eye’s perception of shapes.
Horizontal vs. vertical weight
The example on the left shows an ‘H’ which bars are precisely equal in thickness. This looks wrong.Can you feel it?
The other one on the right has a horizontal bar which has been thinned to appear equal inthickness.
The other one on the right has a horizontal bar which has been thinned to appear equal inthickness.
Glyphs in which optical adjustments have to be made are numerous and include A, E, F, L, H, f, t,and z.
Diagonal thickness
Similarly, if you have bars of the same width and one of them is set at a diagonal, the diagonal barwill seem slightly heavier than the vertical bar and slightly thinner than the horizontal. If youwant it look right, you will have to adjust it to be lighter like the horizontal example, but just alittle less.
Glyphs in which this human perception may be relevant are quite numerous but include k, K, N, Q, R,v, V, w, W, x, X, y, Y, 7, 2, &, ł, Ł, ø, Ø, √, ∕, ‹, ›,«, », ½, ⅓, ¼, ≤, ≥, and ×.
Length and perceived diagonal angle
Longer shapes need to slant less than short shapes in order to give the appearance of same slant.
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The image below has diagonal lines that are all at the same angle. The long one appears to be at adifferent angle.
New file creation 5 9. In the next picture below, the slant of the longer line has been adjusted:
Now let’s look at an actual italic, applying these corrections to the glyphs:
Crossing diagonals
When a bar crosses another diagonal or a straight line, it will need adjustments to not appear asmisaligned.
In the example above, the X on the left has two unadjusted bars crossing each other. The example onthe right has been adjusted so that they appear to be aligned.
As you can see in this X with dotted line on top of it, the X that appears visually aligned involves an offset.
Glyphs in which this illusion is relevant include x, X, k, K, ×, #, and the Icelandic letter ‘eth’(ð).
Perceived height
The shape of a glyph will contribute to how high it needs to be in order to look as if it is thesame height as the other glyphs. Round glyphs need to overshoot the height of flat glyphs by alittle bit. Glyphs which have pointier shapes will need to overshoot more. The sharper the shape,the more it will need to overshoot in order to look correct.
In the image above, the top three shapes are unadjusted — that is, they have identicalheights. The three shapes on the bottom have been adjusted so that they appear more similar inheight.
This illusion is relevant for any glyph that has parts which are either round or pointy. How to set up super chat. Theseinclude O, Q, C, S, A, V, W, and so on.
You are fully qualified to correct for these illusions
Because you can see both the illusion and the effect of correcting for the illusion, you will beable to make these corrections for yourself. You just have to trust your impressions.
Test for fitness of purpose
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Just like you are able to see optical illusions and correct them, you also have the ability to tellif a font is working for the specific use (or uses) you may have in mind. That’s where you shouldalso trust your judgment.
Quite separately, it is worth noting that no font can be evaluated apart from the way it is used andwhat it is used for. This is why it is essential to begin testing from the very beginning of thedesign process, and to continue testing until you feel the project is done.
What will these tests be like? The tests will be simple at first, allowing you to test the firstdesign choices. As your design becomes more complete, your tests will need to keep pace and let youevaluate the relative success or failure of the newest choices you have made — or, evenbetter, to compare two (or three, or more…) options you are considering.
Sometimes you will find you have to double back and change a design choice you thought was alreadyworking well. This is normal. Making a font requires balancing many variables, and surprises oftenoccur. The more you design fonts, the more experience you will have in making these arbitrarychoices.
When nearing the end of the process, if the font is to be used in a simple way, the tests shouldalso just stay simple. However, if a font is to be used in many ways or in a wide range of printingor screen environments, then it should be tested across all that range of situations, which includesprinting various samples of the font.
It can save you design time to have a well defined idea of the final use you intend. However, thisis not always possible and your ideas may evolve. The key thing is to think about and define the usecases as completely as you can, then to ensure that your tests keep pace with the questions you areasking yourself while designing the font.