Tracer rounds are an uncommon type of bullets that are outfitted with a pyrotechnic flare chemical. When fired they burn as they travel and leave a brief streak of light which allows the shooter to easily recognize if their shots are on-target. In Escape from Tarkov the munitions work in the same way: when fired the bullet will streak and can be easily used to monitor ballistic effects like bullet drop.
Tracers are typically loaded in two configurations: They're spaced out to be fired every fifth round, or they're loaded as the the last as the last couple of bullets in a magazine. When spaced in the four-to-one format it provides continuous feedback of accuracy without being visually overwhelming. When loaded as the last few bullets in a magazine it informs the shooter that they're nearly out of ammo and need to reload soon.
In Escape from Tarkov how can I outfit my PMC with mags loaded in such a way? I can do it very slowly by unloading a magazine and individually reloading bullets of the tracer and non-tracer type. Is there an easier way to do this? Loading a 60-round with the spaced tracers magazine requires at least twenty mouse clicks, whereas loading it with one type of bullet only requires one click. Is there any way to set a preset magazine so I can capitalize on the benefits tracers provide? Right now, the effort is not worth the tactical gain and I'm better off loading one type of bullet in my magazine.