B737-700
Flight Crew Last 90 Days 50; Flight Crew Total 10000; Flight Crew Type 5000
Workload; Human-Machine Interface; Situational Awareness
Deviation - Altitude Undershoot; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued Advisory / Alert; Flight Crew FLC complied w / Automation / Advisory
Chart Or Publication; Equipment / Tooling; Human Factors
ATC queried the crew and asked why we didn't continue climbing beyond 13;000 at RIOOS on the TRALR RNAV SID at LAS. We said we received a 'climb via' clearance but only saw 13;000 and we put it in the MCP. However; we were told we were supposed to continue to FL190. Due to the zoomed iPad and super small writing; we couldn't even find FL190 until we zoomed out scrolled all the way down to the bottom of the departure page and both finally found it. The font is tiny; it isn't in the narrative of the departure and the point you are supposed to attain FL 190 at doesn't say FL190 next to [way] point TRALR.
[Reaport narrative contained no additional information].
A B737 flight crew; departing LAS on the TRALR RNAV SID; was surprised when ATC asked why they had stopped their climb at 13;000 FT rather than continuing to FL190 as directed on their departure chart. Reporters cited the primary contributing factor as the inability to read the tiny print on the large and complex SID chart when viewed on their iPad EFB; necessitating zooming in to be able to read it. The chart directive to MAINTAIN FL190 being located at the very bottom right in the ROUTING box and therefore; due to the need to scroll to find it when zoomed in; in the most inconspicuous location on the page.