You can also choose to scale the coefficients to utilize the full dynamic range provided by the coefficient bit width by selecting the Maximize Dynamic Range option. If selected, this results in the filter coefficients being scaled up by a common factor such that the largest coefficient (usually the center tap) is equal to the maximum representable value using the chosen bit width, then quantized. The overall scale factor is calculated as the ratio of the sum of the scaled and quantized coefficients to the sum of the original (ideal) coefficients. This value is calculated by the FIR Compiler and is presented (in dB) as part of the legend text on the filter response graph, or on the Summary page in the Vivado IDE.
The filter response plot for the quantized coefficients is scaled down by the scale factor for easy comparison against the ideal coefficients. Scaling the coefficients introduces a gain which should be taken into account in your design.