Maximum Iterations
From Ultrafractal Wiki
Maximum Iterations (which was known as "maxiter" in Fractint) is a standard setting on all fractal formulae in Ultra Fractal. It can be found on the "Formula Tab" of the "Layer Properties" panel.
Maxiter defines the upper limit on the number of iterations that a formula will execute before stopping (and thereafter passing the results of its calculation to the Coloring Algorithm).
A formula may also "Bail Out" before reaching this limit if the appropriate bailout criterion is met (usually some sort of value largeness or smallness-of-error type of test).
If a point does "bail out" then it is known as an 'Outside' point, whereas those that do not bail out are known as 'Inside'.
