MultiSelect property and AS keyword

If you are mapping a multiselect list box property to an axis and would like to have names without the aggregation on the axis label use something like in this example expression

lets assume my heatmapColumns are mapping to [Gross Profit],[Sales Total],[Discount]

When you do map to property it would generate this expression

Change your original expression  from
$map("Sum($esc(${heatmapColumns}))", ",")

Generated output would look like
Sum([Sales Total]),Sum([Gross Profit]),Sum([Discount])


To see the column names on your screen rather than the aggregation method and column name change the equation to something like below
To
$map("sum($esc(${heatmapColumns})) as [${heatmapColumns}]", ",")

Generated output would look like
sum([Sales Total]) as [Sales Total],sum([Gross Profit]) as [Gross Profit],sum([Discount]) as [Discount]

Cheers!!