Select a variable indicating genetic position. When specified, this variable overrides the Position Variable (if available) from the General tab. When this variable is specified along with a Chromosome Variable , negative log 10 p-values results are plotted by chromosome and position.The Available Variables field is populated with variables from the specified data set.
Left-click a variable from the Available Variables field.
Click to add the selected variable to the Exon Annotation Position Variable field.