.DS is non-destructive; i.e. the contents of the stack do not change.
Note that the actual routine to call to physically display the values is vectored via _D.. Thus the display mode can be changed by ticking the appropriate display word (e.g. D. D$. etc.) and storing the address in _D.. For example, .DS can be modified to display the values as hex values by default by 'ticking' D$. and storing its execution address in _D. as follows:
' D$. TO _D.
123456. 99. 41. 102938475. .DS
(displays 1E240 63 29 622B76B <--TOP)
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