Sometimes one line to drop on in JMix drag-and-drop will be enough. Here's how to change the number of lines available for dropping on. See a demo.
Step 1
Create your drag-and-drop exercise and output to a web page.
Step 2
Open the output htm exercise and find the javascript part starting
//JMIX DRAG-DROP OUTPUT FORMAT CODE and find the line
var DropTotal = 2; // number of lines that will be available for dropping on
.