The Reserve button in Paper opens Profit Reserve Settings. Start by reading the figures before touching the inputs: Total Balance, Locked, marked as Profit Reserve, and Tradable Balance. Remember that Total Balance here includes holdings, while the tradable figure is based on cash and reserve. Opening this dialog does not lock, release, or transfer money. The dialog includes a Skim Rate field and a Save button. Its description says that the setting automatically locks a fraction of realized profits. Realized means a result associated with completed activity, rather than a gain that exists only in an open position's changing value. The setting describes reserve behavior; it does not promise that any trade will make a profit. Read the rate's format carefully. In this Paper dialog, zero point five represents fifty percent, not half of one percent. The interface describes a range from zero point three to zero point six. That is thirty to sixty percent. These are explanations of the displayed control, not a recommendation to select a particular rate. The header's Reserve tooltip can express the rate as a percentage. A saved rate is configuration, not proof that a particular sale increased the reserve. The account and execution path must actually apply the behavior. Check the resulting balances and recorded activity after an event rather than calculating an automatic reserve increase from a green profit number alone. Do not assume every Paper or Live workflow uses an identical reserve rule. Manual Top-up has a different purpose. In this Paper dialog, entering an amount and selecting Lock requests that more existing cash be marked as reserve. It does not add a new deposit to the account. For example, moving fifty dollars from tradable cash into reserve changes the allocation of cash; under that example, the total cash remains the same. Reset Reserve is another change, not a refresh. It opens a confirmation explaining that the reserve goes back to zero and that locked cash becomes tradable again. Read that confirmation and its scope before deciding. Resetting the reserve does not sell your holdings, undo old trades, or remove earlier losses. For this lesson, inspect the demonstration without performing a reset. In Live, use API settings to review the selected connection's trading budget and project reserve controls. The Paper reserve dialog is not the editor for those Live amounts. A connection's skim settings also need to be read in that connection's context. Saving a capital setting does not transfer money to your bank, make an exchange withdrawal, or establish a guaranteed payout. Finish with three distinctions. A rate describes configured behavior. Lock and Reset Reserve request changes to the Paper reserve allocation. A resulting balance or record shows what actually changed. If a save fails or the figures have not refreshed, keep the outcome uncertain until you verify it. Knowing which step you are viewing prevents a setting from being mistaken for a completed financial result.