Clarify the direction of movement for ticklabelstandoff and ticklabelrunoff

Author: my-tien

src/plots/cartesian/layout_attributes.js

@@ -703,15 +703,19 @@ module.exports = {
         dflt: 0,
         editType: 'ticks',
         description: [
-            'Shifts the tick labels by the specified number of pixels in parallel to the axis.'
+            'Shifts the tick labels by the specified number of pixels in parallel to the axis.',
+            'Positive values move the labels in the positive direction of the axis.'
         ].join(' ')
     },
     ticklabelstandoff: {
         valType: 'integer',
         dflt: 0,
         editType: 'ticks',
         description: [
-            'Shifts the tick labels by the specified number of pixels orthogonally to the axis.'
+            'Shifts the tick labels by the specified number of pixels orthogonally to the axis.',
+            'A positive `ticklabelstandoff` will move the labels farther away from the plot area',
+            'if `ticklabelposition` is "outside", and deeper into the plotarea if',
+            '`ticklabelposition` is "inside".'
         ].join(' ')
     },
     mirror: {