Commentaries:
Robertson's Word Pictures (NT)
Many other signs (polla alla shmeia). Not only those described in the Synoptic Gospels or referred to in general statements, but many alluded to in John's Gospel (John 2:23; John 4:45; John 12:37).
Are not written (ouk estin gegrammena). Periphrastic perfect passive indicative of grafw, do not stand written, are not described "in this book." John has made a selection of the vast number wrought by Jesus "in the presence of the disciples" (enwpion twn maqhtwn), common idiom in Luke, not in Mark and Matthew, and by John elsewhere only in I John 3:22. John's book is written with a purpose which he states.
Other Robertson's Word Pictures (NT) entries containing John 20:30:
John 2:2
John 2:11
John 21:25
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