In keeping with the recent line style update, I've made some changes to marker icons. While a few icons have been added, the focus was adding colorability and rotatability, and laying the groundwork to add additional icons at a later date.
Mostly this is a retread of the previous set of icons. A few wildland fire icons have been added, along with a letter-in-circle option. However unlike the previous all-in-one dialog, this one has room to grow.
The color and orientation sections are selectively enabled for icon styles that support them. Currently color is supported for all the circle and arrow icons, and rotation is supported for arrows and the wildland fire line breaks. Click on the color swatch to bring up a color picker, just like with lines and polygons.
For icon styles that support rotation, you can set the orientation by entering a number of degrees, or by clicking on the axes overlaid with a directional arrow.