Open Mixcraft on your computer. Pull up the project that contains the vocal track which you want to alter.
Select the vocal track you want to change by clicking and highlighting the name of the track located just to the left of the timeline.
Click the "fx" button located in the track title section between "solo" and "mute." Click the "Down Arrow" button located next to "Select an Effect" in the window that pops up to open a drop-down menu.
Choose from the list of options and select the effect you want to add. Look under the "Preset" side of the effect list window once you've selected an effect to find the preset is set to "Default." Click the word "Default" to open another drop-down menu and select from the options available the specific type of effect you want to use.
Create your own preset by clicking "Edit" in the effect list window for the preset you want to change. Tweak the different volume knobs that appear in the pop-up window to make the preset exactly how you want it to sound. Save it by clicking the disk icon and then name it whatever you like.