– 56 –Chapter 5 Basic Operations — KEY[Key1] ‑ [Key4]Displays the preview image selected using [View] in the [Sample] column. The sample marker is displayed.Because this is a common setting for [Key1] to [Key4], changing this setting for one key changes the setting of all theother keys.3 Select [Composite] in [View] in the [Sample] column.f Select a composite image of the background image and key.4 Select [Select BG Color] in [Mode] in the [Sample] column.f Specify the color for the background of the foreground image. Normally, either a blue or green background is specified.5 Set [X‑Pos], [Y‑Pos], and [Size] in the [Sample Area] column.f Set the position and size of the sample marker.6 After setting the sample area, select [Sampling] in the [Sampling] column.f The area that has been set is now sampled.f To return the status to the pre-sampling status after sampling is executed, select [Undo] in the [Sample] column. It can undo only the last operation.Removing noise in the background imageRemove the noise in the background image. Perform this operation several times to remove noise.Before the noise is removed After the noise is removed1 Select the / button → [KEY1] to [KEY4] → [Chroma] tab.2 Select [Matte] in [View] in the [Sample] column.f Select the matte image.3 Select [Clean BG Noise] in [Mode] in the [Sample] column.f Remove the noise in the background image.4 Set [X‑Pos], [Y‑Pos], and [Size] in the [Sample Area] column.f Set the position and size of the sample marker at the position of noise (white dots) in the background image.5 After setting the sample area, select [Sampling] in the [Sampling] column.f The noise in the area that has been set is now removed.f To return the status to the pre-sampling status after sampling is executed, select [Undo] in the [Sample] column. It can undo only the last operation.Removing noise in the foreground imageRemove the noise in the foreground image. Perform this operation several times to remove noise.Before the noise is removed After the noise is removed1 Select the / button → [KEY1] to [KEY4] → [Chroma] tab.2 Select [Matte] in [View] in the [Sample] column.f Select the matte image.3 Select [Clean FG Noise] in [Mode] in the [Sample] column.f Remove the noise in the foreground image.