I don't know what the reason, the PADS PCB only click element bonding pad selection element, click in addition to the capture range of welded panel component (such as borders and middle region) are unable to select element, in the TOP layer with CTRL + A also can choose BOT level components selection, don't know what reason be TOP silk screen layer locked, what is the command or A way to unlock this?
above the cursor in the blanks cannot be selected element,

above the cursor in the welding disc can choose components,