grafana/public/app/core/constants.ts

export const GRID_CELL_HEIGHT = 30;
export const GRID_CELL_VMARGIN = 10;
export const GRID_COLUMN_COUNT = 24;
export const REPEAT_DIR_VERTICAL = "v";

export const DEFAULT_PANEL_SPAN = 4;
export const DEFAULT_ROW_HEIGHT = 250;
export const MIN_PANEL_HEIGHT = GRID_CELL_HEIGHT * 3;