INDEX 345 INDEX ACPL , see Avid Component Processing Library Active picture , 102 Add Edit button , 198­199 Advanced Television Standards Committee (ATSC) , 132­133 After Effects, file importing and exporting , 170­171 Alpha channel import settings , 160 movie importing and exporting , 168 premultiplication , 153­157 straight images , 156 Alt/Option key drag-and-drop modifiers , 18 , 21 , 22 Auto-Enable Source Tracks , 21 Auto-nesting , 200­201 Avid Component Processing Library (ACPL), effects , 174 Avid Log Exchange, source ownership assignment , 242 Avid Symphony , see Symphony ® AVX plug-ins standard , 213­214 Back porch , 111 Back-timing, edits , 9 Back up daily projects , 99 guidelines , 68­70 long-term archival , 99­100 nonlinear video assistant role , marking in bin , 20­21 overview , 16 rearranging edits segment movement restriction , 23 segment moving , 22­23 timeline lasso , 21­22 locking items , 91­92 organization , 61­62 sorting columns , 63 Black-burst generator , 301­302 Black point, setting , 271 Blanking interval , 117 Blanking voltage , 103 Blur adding to matte edge , 212 Menu , 208