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.
Create your drag-and-drop exercise and output to a web page.
Open the output htm exercise and find the javascript part starting
//JMIX DRAG-DROP OUTPUT FORMAT CODE and find the linevar DropTotal = 2; // number of lines that will be available for dropping on
.
Change the number to 1 like this
Alternatively, if you have a text ordering exercise, where you need separate lines for a conversation, you can change the value to any number depending on the number of lines you have in the conversation.
Cheers and check the other tutorials with handy tips.