SAP ABAP programming smartforms output Variable format problem

Used in the output of the variable

&symbol& (in parentheses, lowercase letters are variables) &symbol& masking n bits starting from the first bit
&symbol (n) & Show only top n bits
&symbol (S) & Ignore Sign
&symbol (<) & symbol on the left
&symbol (>) & symbol on the right
&symbol (Z) & do not output leading zeros
&symbol (C) & Space compression
&symbol (. N) & Display n-bit decimal digits
&symbol (T) & Ignore thousands separators
&symbol (En) & floating-point power exponent is n
&symbol (NR) & N-bit display, right
&symbol (Ff) & Fill character, fill field with F to full digit display
&symbol (I) & If the field is initial, do not output
&symbol (K) & Disable system type conversion
& ' pre-text ' symbol ' post-text ' & Add text content before and after field output set Date mask = ' date_mask ' to set day display template set time mask = ' Time_ma SK ' Set time display template