Typically I build up opacity gradually using overlapping strokes, so usually I set my opacity pretty low. I don’t often change the opacity setting unless I find a brush is a bit too strong or a bit too weak. ![]() Alternatively we can use the number keys on our keyboard - I can press 1 to set the opacity to 10%, or 9 to set the opacity to 90%, and so on. There’s also an opacity slider that we can drag, and if we hold the Ctrl (Mac: Command) key we can slow down the sensitivity for more precision. If we set the opacity to 2%, then the paint is not going to be as opaque when we make strokes and it will take more effort to build them up to full opacity. Just like with the brush size, we can numerically enter an opacity level. We can control the opacity of a brush from the properties bar. Now let’s talk about how to vary the opacity of our brushes. If you adjust your brush size frequently, this helps you stay in the moment without having to reach for your keyboard. Tip 2 – Wacom Pen Buttons: Another option is assigning one of the buttons on your Wacom Pen to Ctrl-Alt (Mac: Command-Alt), so any time you hold the button down and drag your pen, you can adjust brush size on the fly. If your Wacom tablet has a built-in Touch Ring, like the Wacom Intuos Pro, or you have a Wacom ExpressKey Remote, you can assign the Left and Right Bracket Keys to the Touch Ring, so you can smoothly increase or decrease brush size that way as well. Tip 1 – Touch Ring: Using the Left and Right Bracket Key ( ), you can adjust the radius by small amounts. In addition to the circle visualization, there’s also a meter that shows your radius numerically. In most cases, this visual cue is fairly accurate, but with some brushes like particle brushes, the actual brush stroke may not match the radius. This will create a circle that defines the diameter of your brush. Hold down Ctrl-Alt (Mac: Command-Alt) and tap and drag your brush on the canvas. You could use the slider in the properties bar, but a faster way is to use a keyboard shortcut. In this case, you’re not really concerned about a specific brush size, you just know that you want a big, medium, or small brush. The second method for choosing a brush size is to choose a diameter that is relative to your canvas size. ![]() You can create your own preset brush sizes, delete presets, and even change the view of the icons using the buttons at the bottom of the panel. The Size Library offers you a series of preset brush diameters, from very fine to the maximum brush size of 750 pixels. ![]() You could enter the value numerically in the Properties bar, but what may be faster is to use the Brush Size Library, found in Window > Brush Control Panels > Brush Shape > Size Library. The first is choosing a specific point size for pencil or ink drawing - for example, if you want to use an exact brush size so that your line widths remain consistent. There are two basic ways you might go about choosing a brush size. But I’ll show you a faster way to change your brush size in just a bit. Tip: holding down the Ctrl (Mac: Command) key slows down the slider making it a little more precise. I can enter a numeric value, or there’s a drop down with a slider that I can drag to increase or decrease the brush size. I have the Scratch Board selected, and I can go up to the properties bar choose a brush size there. ![]() Let’s take a look at some of the ways we can resize our brush.
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