The "/timeline" page:
Query parameters:
- a=TIMEORTAG
 - Show events after TIMEORTAG.
 - b=TIMEORTAG
 - Show events before TIMEORTAG.
 - c=TIMEORTAG
 - Show events that happen "circa" TIMEORTAG
 - cf=FILEHASH
 - Show events around the time of the first use of the file with FILEHASH.
 - m=TIMEORTAG
 - Highlight the event at TIMEORTAG, or the closest available event if TIMEORTAG is not part of the timeline. If the t= or r= is used, the m event is added to the timeline if it isn't there already.
 - x=LIST
 - Show check-ins in the comma- or space-separated LIST in addition to check-ins specified by other parameters.
 - sel1=TIMEORTAG
 - Highlight the check-in at TIMEORTAG if it is part of the timeline. Similar to m= except TIMEORTAG must match a check-in that is already in the timeline.
 - sel2=TIMEORTAG
 - Like sel1= but use the secondary highlight.
 - n=COUNT
 - Maximum number of events. "all" for no limit
 - n1=COUNT
 - Same as "n" but doesn't set the display-preference cookie Use "n1=COUNT" for a one-time display change
 - p=CHECKIN
 - Parents and ancestors of CHECKIN
 
- bt=PRIOR
 - ... going back to PRIOR
 - p2=CKIN2
 - ... use CKIN2 if CHECKIN is not found
 - d=CHECKIN
 - Children and descendants of CHECKIN
 
- d2=CKIN2
 - ... Use CKIN2 if CHECKIN is not found
 - ft=DESCENDANT
 - ... going forward to DESCENDANT
 - dp=CHECKIN
 - Same as 'd=CHECKIN&p=CHECKIN'
 - dp2=CKIN2
 - Same as 'd2=CKIN2&p2=CKIN2'
 - df=CHECKIN
 - Same as 'd=CHECKIN&n1=all&nd'. Mnemonic: "Derived From"
 - bt=CHECKIN
 - "Back To". Show ancenstors going back to CHECKIN
 
- p=CX
 - ... from CX back to time of CHECKIN
 - from=CX
 - ... path from CX back to CHECKIN
 - ft=CHECKIN
 - "Forward To": Show descendents forward to CHECKIN
 
- d=CX
 - ... from CX up to the time of CHECKIN
 - from=CX
 - ... path from CX up to CHECKIN
 - t=TAG
 - Show only check-ins with the given TAG
 - r=TAG
 - Same as 't=TAG&rel'. Mnemonic: "Related"
 - tl=TAGLIST
 - Same as 't=TAGLIST&ms=brlist'. Mnemonic: "Tag List"
 - rl=TAGLIST
 - Same as 'r=TAGLIST&ms=brlist'. Mnemonic: "Related List"
 - ml=TAGLIST
 - Same as 'tl=TAGLIST&mionly'. Mnemonic: "Merge-in List"
 - sl=TAGLIST
 - "Sort List". Draw TAGLIST branches ordered left to right.
 - rel
 - Show related check-ins as well as those matching t=TAG
 - mionly
 - Show related parents but not related children.
 - nowiki
 - Do not show wiki associated with branch or tag
 - ms=MATCHSTYLE
 - Set tag name match algorithm. One of "exact", "glob", "like", or "regexp".
 - u=USER
 - Only show items associated with USER
 - y=TYPE
 - 'ci', 'w', 't', 'n', 'e', 'f', or 'all'.
 - ss=VIEWSTYLE
 - c: "Compact", v: "Verbose", m: "Modern", j: "Columnar", x: "Classic".
 - advm
 - Use the "Advanced" or "Busy" menu design.
 - ng
 - No Graph.
 - ncp
 - Omit cherrypick merges
 - nd
 - Do not highlight the focus check-in
 - nsm
 - Omit the submenu
 - nc
 - Omit all graph colors other than highlights
 - v
 - Show details of files changed
 - vfx
 - Show complete text of forum messages
 - f=CHECKIN
 - Family (immediate parents and children) of CHECKIN
 - from=CHECKIN
 - Path through common ancestor from CHECKIN...
 
- to=CHECKIN
 - ... to this
 - to2=CHECKIN
 - ... backup name if to= doesn't resolve
 - shortest
 - ... pick path with least number of nodes
 - rel
 - ... also show related checkins
 - min
 - ... hide long sequences along same branch
 - bt=PRIOR
 - ... path from CHECKIN back to PRIOR
 - ft=LATER
 - ... path from CHECKIN forward to LATER
 - me=CHECKIN
 - Most direct path from CHECKIN...
 
- you=CHECKIN
 - ... to this
 - rel
 - ... also show related checkins
 - uf=FILE_HASH
 - Show only check-ins that contain the given file version All qualifying check-ins are shown unless there is also an n= or n1= query parameter.
 - chng=GLOBLIST
 - Show only check-ins that involve changes to a file whose name matches one of the comma-separate GLOBLIST
 - brbg
 - Background color determined by branch name
 - ubg
 - Background color determined by user
 - deltabg
 - Background color red for delta manifests or green for baseline manifests
 - namechng
 - Show only check-ins that have filename changes
 - forks
 - Show only forks and their children
 - cherrypicks
 - Show all cherrypicks
 - ym=YYYYMM
 - Show only events for the given year/month
 - yw=YYYYWW
 - Show only events for the given week of the given year
 - yw=YYYYMMDD
 - Show events for the week that includes the given day
 - ymd=YYYYMMDD
 - Show only events on the given day. The use "ymd=now" to see all changes for the current week. Add "z" at end to divide days at UTC instead of localtime days. Use ymd=YYYYMMDD-YYYYMMDD (with optional "z") for a range.
 - year=YYYY
 - Show only events on the given year. The use "year=0" to see all changes for the current year.
 - days=N
 - Show events over the previous N days
 - datefmt=N
 - Override the date format: 0=HH:MM, 1=HH:MM:SS, 2=YYYY-MM-DD HH:MM:SS, 3=YYMMDD HH:MM, and 4 means "off".
 - bisect
 - Show the check-ins that are in the current bisect
 - oldestfirst
 - Show events oldest first.
 - showid
 - Show RIDs
 - showsql
 - Show the SQL used to generate the report
 
p= and d= can appear individually or together. If either p= or d= appear, then u=, y=, a=, and b= are ignored.
If both a= and b= appear then both upper and lower bounds are honored.
When multiple time-related filters are used, e.g. ym, yw, and ymd, which one(s) is/are applied is unspecified and may change between fossil versions.
CHECKIN or TIMEORTAG can be a check-in hash prefix, or a tag, or the name of a branch.