Howto: Describe type(s) of treatment

	Before for example a multivariate analysis may be started ProSE needs to know which samples have to be assigned which label. Therefore, chose the action "Describe type(s) of treatment and assign samples..." on the experiments overview page.
	Click "Add a new type of treatment / factor ..." to create a new factor.
	Please chose a "sound" identifier.
	You may want to query to EBI ontologies(OLS) for an approbiate identifier.
	Afterwards, click on "Add a new level for this type of treament/factor..." to create a new level for the previously created type of treatment.
	Again, please chose an identifier for this value.
	The type of treatment, here "Time" has been created with one level "20min"
	A complete experiment might look as shown on this picture. Finally, samples have to be assigned to the created treatments. Therefore, click on "Assign sample(s) to this level ...".
	Select more than one sample using the "Ctrl" key. Finally, click the "Assign" button to link the samples to the chosen level of treatment.