To create a Manual Loop using the software, you will first need to open the Loops tab
Manual Loops allow you to create a loop on the fly at any length you choose, and have the option to make further adjustments if you don’t create the loop right the first time.
Loop In - Sets the in point of the loop. When a loop is active, clicking Loop In again will allow you to manually edit the start point of the loop. Use the Keyboard Shortcuts O or L for the left and right decks respectively.
Loop Out - Sets the out point of the loop. Again, when a loop is active, clicking Loop Out again will allow you to manually edit the end point of the loop. Use the Keyboard Shortcuts P and ; (semicolon) for the left and right decks respectively.
A convenient way of editing the in and out points is with the platter of your Serato DJ hardware, turntable or CDJ, or using the left and right arrows on your keyboard. Holding shift while moving the left and right arrows will make your adjustment even faster. Clicking the Loop In or Loop Out buttons after you have made your adjustments will keep the change.
Slot Reloop - Jump to the start point and activate the loop. Clicking the Reloop button when a loop is active will Reloop the loop. Use Keyboard Shortcuts alt + [ and alt + ‘ (apostrophe) for the left and right decks respectively. When the Quantize feature is enabled, Reloop will trigger in time with the Beatgrid. You can adjust the number of beats allowed between each Reloop trigger in the DJ Preferences tab of the Setup screen.
Loop On/Off - Press the ‘loop’ button to turn the current loop on or off, or use the Keyboard Shortcuts [ and ‘ (apostrophe) for the left and right decks respectively.
Loop Slot - Select Shifts active loop focus through all 8 loops so you can edit the loop slot. Use the Keyboard Shortcuts alt + O and alt + P to shift loop focus up and down on the left deck, alt + L and alt + ; (semicolon) for the right deck.