Tools>Forms>Design Mode toggles moving, marking, deleting buttons like Set Names. You add them using Insert>Form Control>Push Button.
Also, notice there have been some style applied. View>Sidebar then click on the A button toward the upper right of the sidebar. Then right click the style that is highlighted when the cell whose style you want to change is selected on the spreadsheet. from the drop menu (from right clicking) select Edit style, then Background tab (or Background in left pane perhaps in 25.2) and pick your color.
Styles, styles, styles! They let you design a dashboard then completely rework it with very little effort. There are even quicker ways (A with recycle arrows button in sidebar after editing a selected cell style) to update any style.
[READ then FORGET this paragraph…SEE BELOW: Anticipating your need for different bracket sheets, I also setup modular math for the initial and second-life positions. The 1 has to stay 1 at the top left (1st left position number) but the one right below it (2nd position number) can be copied down to 4th, and from then on the next pair (3rd and 4th position numbers, 2nd set of competitors) can be copied down indefinitely. They listen to the 8 up in B1 (or near there). The right pairs (second-life pairs) can be copied down in pairs indefinitely starting with the top pair (1st and 2nd position number to the right).]
EDIT: Further tested the bracket position numbers and redid them so they are based on a simple nth value column. See new version attached. You can just hide the numeric columns or format them so that the font is the same as the background (hence, invisible)–using styles! You can just pull down the (here darker grey) column right through, so you don’t have to maintain row spacing, you just have to have the 1, 2, 3, … sequence where needed in column A any how that works for a given bracket.
I also implemented @JohnSUN’s Peter-do-you-love-me approach to slowing down button clicks.
Pool.ods (33.9 KB)