Online Documentation for Advanced Data Import for RAD Studio VCL
First select the dataset field from the 'Fields' drop-down list. Then set two separator lines to delimit the source table column. Click to add a separator, double-click to delete one. Drag separators to change the column width. You can also set the column starting position and the column width manually in the edit fields 'Pos' and 'Size'.
When you set the separators correctly, proceed to another field and repeat these operations for each dataset field.
If you don't want some first rows of the source table to be imported set the number of such rows in the 'Skip ... first line(s)' edit field.