LEFT_HAND is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Object in the right hand column of the graphic" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_LEFT_HAND TYPE LEFT_HAND.
The LEFT_HAND table consists of various fields, each holding specific information or linking keys about Object in the right hand column of the graphic data available in SAP. These include ID (Character field of length 40), TEXT (Char 80), TEXT_S (Char 20), COLOUR_ID (Color)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .