A MEL script to inspect the pane element under the cursor.

getMayaPaneInspector.mel

// Find out the name of the Maya GUI pane element under the cursor
string $pointedPaneElement = `paneLayout -paneUnderPointer`;
string $paneConfig = `paneLayout -query -configuration $pointedPaneElement`;
int $paneChildren = `paneLayout -query -numberOfChildren $pointedPaneElement`;
string $docTag = `paneLayout -query -docTag $pointedPaneElement`; 
int $visible = `paneLayout -query -visible $pointedPaneElement`; 
int $manage = `paneLayout -query -manage $pointedPaneElement`;
int $enable = `paneLayout -query -enable $pointedPaneElement`;
int $width = `paneLayout -query -width $pointedPaneElement`;
int $height = `paneLayout -query -height $pointedPaneElement`;
string $annotate = `paneLayout -query -annotation $pointedPaneElement`;
string $children[] = `paneLayout -query -childArray $pointedPaneElement`;

print("Maya Pane Inspector" + "\n");
print("[Pane] " + $pointedPaneElement + "\n");
print("[Config] " + $paneConfig + "\n");
print("[Visible] " + $visible + "\n");
print("[Width] " + $width + "\n");
print("[Height] " + $height + "\n");
print("[Enable] " + $enable + "\n");
print("[Annotate] " + $annotate + "\n");
print("[docTag] " + $docTag + "\n");
print("[Manage] " + $manage + "\n");
print("[Number of Children] " + $paneChildren + "\n");
print("[Children] ");
print($children);
print("\n");