FIG. 1 is a perspective view of a background support stand showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is a perspective view of the background support stand where the background support stand is in a configuration of use;
FIG. 10 is a perspective view of a unilateral stand of the background support stand in a folded state where the unilateral stand is shown separately to reveal aspects of the design that may not apparent in the other views;
FIG. 11 is an enlarged view of portion 11 shown in FIG. 1;
FIG. 12 is an enlarged view of portion 12 shown in FIG. 1;
FIG. 13 is an enlarged view of portion 13 shown in FIG. 2; and,
FIG. 14 is an enlarged view of portion 14 shown in FIG. 8.
The broken lines in FIG. 9 depict environment structure, specifically a backdrop, and forms no part of the claimed design. The remaining dash-dash broken lines in the figures depict portions of the background support stand that form no part of the claimed design. The dot-dash broken lines represent boundaries of the enlarged portions and form no part of the claimed design.