The allocation hot spots view settings dialog is accessed by bringing the allocation hot spots to front and choosing View->View Settings from JProfiler's main menu or clicking on the corresponding  toolbar button.

You can select a size scale mode for all displayed sizes: Automatic Depending on the size value, it's displayed in MB, kB or bytes, in such a way that 3 significant digits are retained. Megabytes (MB) Kilobytes (kB Bytes

The node description options control the amount of information that is presented in the description of each node. Show size bar If this option is checked, a size bar will be displayed whose length is proportional to the number of allocations that was contributed to the hot spot along the particular call path. Always show fully qualified names If this option is not checked, class name are omitted in intra-class method calls which enhances the conciseness of the display. This option is only relevant for the "methods" aggregation level. Always show signature If this option is not checked, method signatures are shown only if two methods with the same name appear on the same level. This option is only relevant for the "methods" aggregation level.

The percentage calculation determines against what allocation numbers percentages are calculated for the hot spot backtraces. Absolute Percentage values show the contribution to the total number of allocations. Relative Percentage values show the contribution relative to the called method.

The sorting of the difference column can be toggled between absolute value ordering or normal ordering.